Accident to the Mudry Cap10BK registered F-GGYC on 23/05/2021 at Peyrolles-en-Provence

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After five minutes and thirty seconds, during which the pilot performed several aerobatic figures under G-forces, he performed inverted flight for about ten seconds and then switched back to normal flight. During this manoeuvre, the G-force increased from approximately -1.9 g to +1.6 g in five seconds. The aircraft's flight path then curved sharply towards the ground as a result of a nose-down input on the elevator. The G-force decreased and reached -3.9 g. Based on the accelerometer data, this final path is similar to an English bunt manoeuvre. The aircraft continued its vertical path towards the ground until it collided with the surface of the lake.

The investigation was not able to determine with certainty whether the action on the controls was deliberate or not.

The following hypotheses can be envisaged to explain the loss of control by the pilot:

• The occurrence of partial or total incapacitation resulting from a succession of figures under negative and positive G-forces and which ended with a high negative G-force. This incapacitation may have taken the form of G-induced almost loss of consciousness (A-LOC), G-induced loss of consciousness (G-LOC), a malaise due to a heart problem or another type of problem, or spatial disorientation. The pilot's medication for high blood pressure may have reduced his tolerance to the acceleration changes.
• The uncontrolled performance of an aerobatic figure by the pilot.
• The occurrence of an untimely event on board during the performance of the figure after passing the vertical axis (e.g. object incorrectly secured in the cockpit, reflex action of the passenger) which could have disturbed the pilot.

The occurrence of a technical malfunction, which the investigation was unable to rule out with certainty.

General information

Local date	23/05/2021
Responsible entity	France - BEA
Scope of Investigation	Full (Annex 13) type investigation
State or area of occurrence	Europe and North Atlantic - France - 13 Bouches-du-Rhône
Location	Peyrolles lake
Human consequences	Fatal
Number of death	2
Aircraft consequences	Destroyed
Occurrence class	Accident
Occurence category	LALT: Low altitude operations
File number	BEA2021-0222

Flight Information

Aircraft category	Fixed Wing - Aeroplane - Small Aeroplane - Small Aeroplane
Operator	France (Aerobatic Club de la Méditerranée)
Manufacturer / Model	MUDRY - CAP10
Aircraft Registration	F-GGYC
State of registry	France
Last departure point	France - LFMA : Aix-Les-Milles
Planned destination	France - LFMA : Aix-Les-Milles
Flight phase	Manoeuvring
Serial number	235
Operator Type AG	Flying club/school
Operation Type	Non-Commercial Operations - Flight Training/Instructional - Aerobatics

BEA is the French air safety investigation authority for civil aviation. The sole objective of the investigation is to improve air safety. It is intended neither to apportion blame nor to assess responsiblity.

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